+-----+-----+-----+-----+-----+-----+-----+-----+-----+-----+
|     |     |     "     |     |     "     |     "     "     |
|     |  6  |     "     |  8  |  4  "     |     "     "     |
|     |     |     "     |     |     "     |     "     "     |
+-----+-----+-----+-----+-----+-----+-----+=====+=====+=====+
|     |     |     "     |     |     "     "     "     "     |
|  9  |  3  |  4  "     |     |     "     "     "     "     |
|     |     |     "     |     |     "     "     "     "     |
+-----+-----+-----+-----+-----+-----+=====+=====+=====+=====+
|     |     |     "     |     |     "     "     "     "     |
|     |  8  |     "     |     |     "  6  "     "     "     |
|     |     |     "     |     |     "     "     "     "     |
+=====+=====+=====+=====+=====+=====+=====+=====+=====+-----+
|     |     |     "     |     "     "     "     "     |     |
|     |     |     "     |     "  5  "     "  7  "     |     |
|     |     |     "     |     "     "     "     "     |     |
+-----+-----+-----+-----+=====+=====+=====+=====+=====+=====+
|     |     |     "     "     "     "     "     |     |     |
|  3  |     |     "     "     "     "  8  "     |     |  7  |
|     |     |     "     "     "     "     "     |     |     |
+-----+-----+-----+=====+=====+=====+=====+-----+-----+-----+
|     |     |     "     "     "     "     "     |     |     |
|  6  |     |     "  2  "     "     "     "     |     |  8  |
|     |     |     "     "     "     "     "     |     |     |
+=====+=====+=====+=====+=====+=====+-----+-----+-----+-----+
|     |     "     "     "     "     |     "     |     |     |
|     |     "  1  "     "  3  "     |     "     |     |     |
|     |     "     "     "     "     |     "     |     |     |
+-----+=====+=====+=====+=====+=====+=====+=====+=====+=====+
|     "     "     "     "     |     |     "     |     |     |
|     "     "     "  4  "     |     |     "     |  8  |     |
|     "     "     "     "     |     |     "     |     |     |
+=====+=====+=====+=====+-----+-----+-----+-----+-----+-----+
|     "     "     "     "     |     |     "     |     |     |
|     "     "     "     "     |     |     "  4  |  2  |  1  |
|     "     "     "     "     |     |     "     |     |     |
+=====+=====+=====+-----+-----+-----+-----+-----+-----+-----+
|     "     "     |     "     |     |     "     |     |     |
|     "     "     |     "  6  |  8  |     "     |  7  |     |
|     "     "     |     "     |     |     "     |     |     |
+-----+-----+-----+-----+-----+-----+-----+-----+-----+-----+